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. Author manuscript; available in PMC: 2010 Sep 21.
Published in final edited form as: J Biomater Sci Polym Ed. 2010 Jun 16;21(13):1761–1782. doi: 10.1163/092050609X12567178204169

Figure 1.

Figure 1

Schematics of POMC synthesis. Step 1: Synthesis of pre-POMC by reacting citric acid, maleic acid and 1,8-octanediol. Ratios of maleic acid and citric acid were varied as 10:0, 8:2, 6:4, 4:6 and 2:8, respectively, whereas the ratio of overall acid to diol was kept as 1:1. All the monomers were melted at 160°C under a nitrogen blanket. Further polymerization was continued at 135°C for 125 min to obtain a low-molecular-weight pre-polymer. Step 2: Photo-cross-linking of pre-POMC was performed under 365 nm UV light for 3 min in the presence of a photoinitiator (Igacure 2959).